Safety-cock.



No. 846,257. I I PATENTED MAR. 5, l90 7= J. G. 'STRATIFF.

SAFETY 000K. APPLICATION FILED APE.21.1905.

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UNITED STATES PATENT oirrron.

SAFETY-COCK.

Specification of Letters Patent.

Patented March 5, 1907.

Application filed April 21,1905. Serial No. 256,742.

To all whom it may concern:

Be it known that I, JAMES CHARLES STRA- TIFF, a citizen of the United States, and a resident of Tyrone, in the county of Blair and State of Pennsylvania, have invented a new and Improved Safety-Cock, of which the following is a full, clear, and exact description.

My invention relates to cocks, and particularly those in which the assage is controlled by a plug. Its principa objects are to provide means by which the plug may be locked in position in such a manner as to prevent its being tampered with by unauthorized persons.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both views.

Figure 1 is a central vertical longitudinal section through one embodiment of my invention; and Fig. 2 is an end elevation thereof looking from the leftin Fig. 1, parts being broken away.

I have here illustrated an angle-cock such as is commonly employed in connection with automatic air-brake systems, in which designates a body having a passage 11 and a tapered bore to receive the usual perforated plug 12. This plug is maintained within the bore by a suitable securing device 13 and has at its opposite extremity a handle 14, from which depends a projection 15, movable between stops 16 and 17, carried by the body.

At one side of the body adjacent to the bore is an enlargement 18, recessed out to furnish'a chamber which is open at the top to give access to its interior, said opening being closed by a plate 19, fixed in position in any desired manner. Through the inner and outer walls of the chamber are alined openings 20 and 21, respectively, serving as guides for a locking member or bolt 22. The opening 20 is polygonal, and the end of the locking member 22, moving in the said openis also polygonal to fit the opening. This bolt may move through the opening 20 into the bore of the body and enter a recess 23 is the plug, said recess being shaped to fit the end of the bolt. Across the chamber is a wall 24, and engaging this and a collar 25 upon the bolt is a spring 26, serving to force the bolt inwardly and tending to seat it in the plug-recess. Within the chamber outside the wall 24 the bolt has an operating projection 27, in proximity to which, throughone of the side walls of the chamber, is an opening 2-8, adapted to receive a key 29. The pin of this key may enter and be supported by a recess 31 in the chamber-wall opposite the opening 28, and when so positioned its ward 32 comes opposite the proj cation 27, which may be maintained against rotation and in its correct relation to the keyward by squaring one of the ends of the bolt into its guide-opening.

It will be seen that when the plug is so turned that its recess is engaged by the bolt this will hold it against rotation, the handle being ineffective to operate it; but upon the introduction of a suitable key into the opening 28 this may be turned to engage the proj ection and draw the bolt from the plug-recess against the tension of its spring, thus releasing the plug and allowing it to be moved by its handle.

While I have here illustrated my invention in connection with an air-brake cook, it will be obvious that it may be applied to any such device of the plug type.

Having thus described my invention, I claim as new and desire to secure by Letters Patent A cock comprising a body provided at one side with a chamber having alined horizontal openings, an opening at right angles to said openings and a recess in the wall opposite the last-named opening, the chamber being also provided with a transverse wall, a plug operating in the body and provided with a polygonal recess in one side, a bolt working in the alined openings of the chamber and having a polygonal inner end, and provided with a collar a short distance from said inner end and with a lug within the said chamber for engagement by the ward of a key for operating the same, and a spring surrounding the bolt between the transverse wall of the chamber and the collar of the bolt, substantially as herein shown and described;

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES CHARLES STRATIFF.

Witnesses:

W. G. CUPP, L. F. STRATIFF. 

